<!DOCTYPE html >
<html>
<head>
<script 
src = "http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
	$("#flip").click(function(){
		$("#panel").slideDown(5000);
	});
	$("#stop").click(function(){
		$("#panel").stop();
	});
});
</script>

<style type="text/css">
#panel,#filp
{
padding:5px;
text-align:center;
background-color:#e5eecc;
border:solid 1px #c3c3c3;
}
#panel
{
padding:50px;
display:none;
}
</style>
</head>
<body>

<button id ="stop">Stop sliding</button>
<div id ="flip">Click to slide down panel</div>
<div id ="panel">Hello World!?</div>
</body>
</html>